<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Wellcome</title>
</head>
<body>
<div class="panel panel-primary">
    <div class="panel-heading">
        <h3 class="panel-title">欢迎</h3>
    </div>
    <div class="panel-body">
        ssss
    </div>
</div>

</body>
</html>